Waste heat recovery device for ironmaking furnace

Abstract

The utility model discloses a waste heat recovery device of an iron smelting furnace, which belongs to the field of metal smelting and comprises a waste heat recovery box body, the waste heat recovery box body is divided into a steam chamber and a waste gas waste heat ventilation chamber through a partition plate, one side of the steam chamber is provided with an air bag for storing steam, and the steam chamber is a one-way open chamber. And a corresponding steam cover is arranged at the open end of the steam chamber. Compared with the prior art, the device has the advantages that the heat pipe steam generator of the device is composed of a plurality of heat pipe elements, a water seal gasket and a graphite packing gasket in the sealing device are used for double sealing, and when a certain pipeline is damaged, only the damaged heat pipe element needs to be taken down from a columnar partition plate groove and replaced with a new heat pipe element, so that the heat pipe steam generator is simple in structure and convenient to use. The problem that the heat pipe steam generator needs to be completely disassembled when being locally damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the field of metal smelting, in particular to a waste heat recovery device for an ironmaking furnace. Background Art

[0002] During the metal smelting process, a large amount of high-temperature gas will be generated. These high-temperature gases will float out from the vents of the furnace cover along with the slag and smoke. After passing through the settling chamber and purification device, they are directly discharged along with the purified waste gas. According to statistics, the heat of these high-temperature gases discharged with the smoke accounts for 13%-20% of the total heat. Therefore, in order to save energy, people usually install iron-making furnace waste heat recovery devices between the settling chamber and the purification device to save energy.

[0003] Existing waste heat recovery devices for iron-making furnaces usually use partitions to divide the waste heat recovery box into a steam chamber and an exhaust gas waste heat ventilation chamber. The heat in the exhaust gas waste heat ventilation chamber is transferred to the steam chamber through a heat pipe steam generator and converted into steam. The steam is stored in an air bag connected to the steam chamber for subsequent use of steam energy.

[0004] Although this iron-making furnace waste heat recovery device can recover the converted waste heat, because the iron-making furnace waste heat recovery device needs to be used for a long time, the heat pipe steam generator will inevitably cause pipeline corrosion due to harmful gases in the exhaust gas during long-term use. Once the local pipeline corrosion is serious, the heat pipe steam generator will lose its function. Because the heat pipe steam generator is an integrated connection, the heat pipe steam generator needs to be completely removed for maintenance when it is partially damaged. Utility Model Content

[0005] The technical problem to be solved by the utility model is that when the existing heat pipe steam generator is partially damaged, it cannot be partially taken out for repair and can only be completely taken out for repair.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a waste heat recovery device for an ironmaking furnace comprises a waste heat recovery box, the waste heat recovery box is divided into a steam chamber and an exhaust gas waste heat ventilation chamber by a partition, an air bag for storing steam is provided on one side of the steam chamber, the steam chamber is a one-way open chamber, and a corresponding steam cover is provided at the open end of the steam chamber, a heat pipe steam generator is provided inside the waste heat recovery box, the heat pipe steam generator is composed of a plurality of heat pipe elements, the heat pipe elements pass through the partition, the heat pipe elements are connected to the partition through a sealing device, the sealing device comprises a graphite packing gasket and a water seal gasket which are sequentially sleeved on the outer wall of the heat pipe element, and a cylindrical partition groove for storing the graphite packing gasket and the water seal gasket is provided inside the partition.

[0007] As an improvement, the heat pipe element includes a heat absorbing pipe section located inside the exhaust gas waste heat ventilation chamber and a heat releasing pipe section located inside the steam chamber, and the bottom surface of the exhaust gas waste heat ventilation chamber is provided with a fixing groove corresponding to the heat absorbing pipe section.

[0008] As an improvement, two mutually opposite sides of the exhaust gas waste heat ventilation chamber are respectively provided with an exhaust gas inlet and an exhaust gas outlet.

[0009] As an improvement, a water inlet is provided at the top of one side of the steam chamber, a water outlet corresponding to the water inlet is provided on the side of the ground contact surface of the steam chamber, a steam outlet connected to an air bag is provided on one side of the steam cover, the air bag is connected to the steam outlet through a steam pipe, a sealing strip is provided on the inner wall of the open end of the steam chamber, the inner wall of the open end of the steam chamber and the steam cover are connected to the sealing strip through body contact, and the open end of the steam chamber is connected to the steam cover through a bolt structure.

[0010] As an improvement, the graphite packing gasket and water seal gasket are both sleeved on the cylindrical surface of the heat release pipe section, the cylindrical partition groove passes through the partition, the water seal gasket is fixedly connected to the cylindrical partition groove through a rotating nut, and the heat release pipe section passes through the graphite packing gasket, water seal gasket and rotating nut.

[0011] As an improvement, the rotating nut is connected to the outer wall of the cylindrical partition groove through a bolt structure, and the inner wall of the cylindrical partition groove and the column body of the heat release pipe section are connected to the water seal gasket through body contact.

[0012] The advantages of the utility model over the prior art are as follows: the heat pipe steam generator of the device is composed of a plurality of heat pipe elements, and double sealing is performed using a water seal gasket and a graphite packing gasket in a sealing device. When a certain pipe is damaged, only the damaged heat pipe element needs to be removed from the cylindrical partition groove and replaced with a new heat pipe element, thus avoiding the problem that the heat pipe steam generator needs to be completely disassembled due to partial damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a general structural diagram of a waste heat recovery box of a waste heat recovery device for an ironmaking furnace.

[0014] Figure 2 It is a structural diagram of a heat pipe element of an ironmaking furnace waste heat recovery device of the utility model.

[0015] Figure 3 It is a cross-sectional view of a waste heat recovery box of an ironmaking furnace waste heat recovery device of the utility model.

[0016] Figure 4 It is an exploded view of the sealing device of the ironmaking furnace waste heat recovery device of the utility model.

[0017] As shown in the figure: 1. Waste heat recovery box; 11. Steam chamber; 111. Water inlet; 112. Water outlet; 12. Waste gas waste heat ventilation chamber; 121. Waste gas inlet; 122. Waste gas outlet; 13. Air bag; 14. Steam cover; 141. Steam outlet; 15. Sealing strip; 2. Partition; 3. Heat pipe steam generator; 31. Heat pipe element; 311. Heat energy absorption pipe section; 312. Heat release pipe section; 313. Fixed groove; 4. Sealing device; 41. Columnar partition groove; 42. Graphite packing gasket; 43. Water seal gasket; 44. Rotating nut. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] As the instruction manual Figure 1 , 3 4, comprising a waste heat recovery box 1, the waste heat recovery box 1 is divided into a steam chamber 11 and an exhaust gas waste heat ventilation chamber 12 by a partition 2, one side of the steam chamber 11 is provided with an air bag 13 for storing steam, the steam chamber 11 is a one-way open chamber, the open end of the steam chamber 11 is provided with a corresponding steam cover 14, the waste heat recovery box 1 is provided with a heat pipe steam generator 3 inside, the heat pipe steam generator 3 is composed of a plurality of heat pipe elements 31, the heat pipe element 31 passes through the partition 2, the heat pipe element 31 is connected to the partition 2 by a sealing device 4, the two opposite sides of the exhaust gas waste heat ventilation chamber 12 are respectively provided with an exhaust gas inlet 121 and a waste gas outlet 122. A gas outlet 122 is provided, a water inlet 111 is provided at the top of one side of the steam chamber 11, a water outlet 112 corresponding to the water inlet 111 is provided on one side of the grounding surface of the steam chamber 11, a steam outlet 141 connected to the air bag 13 is provided on one side of the steam cover 14, the air bag 13 is connected to the steam outlet 141 through a steam pipe, a sealing strip 15 is provided on the inner wall of the open end of the steam chamber 11, the inner wall of the open end of the steam chamber 11 and the steam cover 14 are connected to the sealing strip 15 through body contact, the open end of the steam chamber 11 is connected to the steam cover 14 through a bolt structure, and the heat energy in the exhaust gas is converted into steam energy through the heat pipe element 31, and stored through the air bag.

[0020] As the instruction manual Figure 1 , 24, the sealing device 4 comprises a graphite packing gasket 42 and a water seal gasket 43 which are sequentially sleeved on the outer wall of the heat pipe element 31, the interior of the partition plate 2 is provided with a cylindrical partition plate groove 41 for storing the graphite packing gasket 42 and the water seal gasket 43, the heat pipe element 31 comprises a heat energy absorption pipe section 311 located inside the exhaust gas waste heat ventilation chamber 12 and a heat release pipe section 312 located inside the steam chamber 11, the bottom surface of the exhaust gas waste heat ventilation chamber 12 is provided with a fixing groove 313 corresponding to the heat energy absorption pipe section 311, the graphite packing gasket 42 and the water seal gasket 43 are both sleeved on the cylindrical surface of the heat release pipe section 312 The cylindrical partition groove 41 passes through the partition 2, and the water seal gasket 43 is fixedly connected to the cylindrical partition groove 41 through a rotating nut 44. The heat release pipe section 312 passes through the graphite packing gasket 42, the water seal gasket 43 and the rotating nut 44. The rotating nut 44 is connected to the outer wall of the cylindrical partition groove 41 through a bolt structure. The inner wall of the cylindrical partition groove 41 and the column body of the heat release pipe section 312 are both connected to the water seal gasket 43 through body contact. Through the double isolation of the graphite packing gasket 42 and the water seal gasket 43, harmful gases in the exhaust gas can be prevented from entering the steam chamber 11 while ensuring waterproofness.

[0021] In the specific implementation of the utility model, the heat energy absorption pipe section 311 of the heat pipe element 31 is passed through the cylindrical partition groove 41, and the bottom column of the heat energy absorption pipe section 311 is inserted into the fixed groove 313 on the bottom surface of the exhaust gas residual heat ventilation chamber 12; the heat release pipe section 312 of the heat pipe element 31 is inserted into the inner ring of the graphite packing gasket 42; the water seal gasket 43 is sleeved in the inner hole of the cylindrical partition groove 41; the rotating nut 44 is screwed on the threaded end of the outer wall of the cylindrical partition groove 41, and at this time, the heat release pipe section 312 of the heat pipe element 31 passes through the inner ring of the graphite packing gasket 42, the inner ring of the water seal gasket 43, and ... water seal gasket 43. And rotate the inner hole of the nut 44 (repeat the above operation until all the cylindrical partition grooves 41 are completely sealed); fix the sealing strip 15 to the open end of the steam chamber 11, align the screw holes of the steam cover 14 and the inner wall of the open end of the steam chamber 11, screw in the screws to fix it, and connect the connecting pipe of the air bag 13 to the steam outlet 141 using a fixed bracket; the water inlet 111 and the water outlet 112 are connected to the water pipe, and the water outlet 112 is normally closed; the exhaust gas inlet 121 is connected to the sedimentation chamber outlet with screws, and the exhaust gas outlet 122 is connected to the purification device inlet with screws.

[0022] When in use, open the water inlet 111, inject purified water into the steam chamber 11, start the ironmaking furnace after the injection, and the exhaust gas will continuously float into the exhaust gas waste heat ventilation chamber 12 from the exhaust gas inlet 121. The heat energy in the exhaust gas is continuously absorbed by the heat pipe element 31, and the heat energy is transferred from the heat energy absorption pipe section 311 to the heat release pipe section 312. The purified water in the steam chamber 11 is continuously heated, and the water vapor generated floats from the steam outlet into the air bag 13 for storage, while the cooled exhaust gas floats into the purification device from the exhaust gas outlet 122. If individual heat pipe elements are If the heat pipe element 31 is damaged, it is only necessary to stop the exhaust gas intake, drain the purified water from the water outlet 112, open the steam cover 14, unscrew the corresponding rotating nut 44 of the damaged heat pipe element 31, take out the damaged heat pipe element 31 for replacement, put the graphite packing gasket 42 and the water seal gasket 43 on the outer wall of the heat release pipe section 312 of the new heat pipe element 31 in sequence, put it into the cylindrical partition groove 41, and finally screw on the rotating nut 44 to fix it; close the steam cover 14, screw on the screws to fix it, then repeat the start-up operation process to restart the ironmaking furnace waste heat recovery device.

[0023] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A waste heat recovery device for an ironmaking furnace, comprising a waste heat recovery box (1), wherein the waste heat recovery box (1) is divided into a steam chamber (11) and an exhaust gas waste heat ventilation chamber (12) by a partition (2), an air bag (13) for storing steam is provided on one side of the steam chamber (11), the steam chamber (11) is a one-way open chamber, and a corresponding steam cover (14) is provided at the open end of the steam chamber (11), a heat pipe steam generator (3) is provided inside the waste heat recovery box (1), and the characteristics are as follows: The heat pipe steam generator (3) is composed of a plurality of heat pipe elements (31), wherein the heat pipe elements (31) pass through a partition (2), and the heat pipe elements (31) are connected to the partition (2) via a sealing device (4), wherein the sealing device (4) comprises a graphite packing gasket (42) and a water seal gasket (43) which are sequentially sleeved on the outer wall of the heat pipe element (31), and a columnar partition groove (41) for storing the graphite packing gasket (42) and the water seal gasket (43) is provided inside the partition (2).

2. The ironmaking furnace waste heat recovery device according to claim 1, characterized in that: The heat pipe element (31) comprises a heat energy absorbing pipe section (311) located inside the exhaust gas waste heat ventilation chamber (12) and a heat releasing pipe section (312) located inside the steam chamber (11), and a fixing groove (313) corresponding to the heat energy absorbing pipe section (311) is provided on the bottom surface of the exhaust gas waste heat ventilation chamber (12).

3. The ironmaking furnace waste heat recovery device according to claim 1, characterized in that: Two mutually opposite sides of the exhaust gas waste heat ventilation chamber (12) are respectively provided with an exhaust gas inlet (121) and an exhaust gas outlet (122).

4. The ironmaking furnace waste heat recovery device according to claim 1, characterized in that: A water inlet (111) is provided at the top end of one side of the steam chamber (11); a water outlet (112) corresponding to the water inlet (111) is provided at one side of the grounding surface of the steam chamber (11); a steam outlet (141) connected to the air bag (13) is provided at one side of the steam cover (14); the air bag (13) is connected to the steam outlet (141) via a steam pipe; a sealing strip (15) is provided on the inner wall of the open end of the steam chamber (11); the inner wall of the open end of the steam chamber (11) and the steam cover (14) are both connected to the sealing strip (15) via body contact; and the open end of the steam chamber (11) is connected to the steam cover (14) via a bolt structure.

5. The ironmaking furnace waste heat recovery device according to claim 2, characterized in that: The graphite packing gasket (42) and the water seal gasket (43) are both sleeved on the cylindrical surface of the heat release pipe section (312); the cylindrical partition groove (41) passes through the partition (2); the water seal gasket (43) is fixedly connected to the cylindrical partition groove (41) via a rotating nut (44); and the heat release pipe section (312) passes through the graphite packing gasket (42), the water seal gasket (43) and the rotating nut (44).

6. The ironmaking furnace waste heat recovery device according to claim 5, characterized in that: The rotating nut (44) is connected to the outer wall of the cylindrical partition groove (41) through a bolt structure, and the inner wall of the cylindrical partition groove (41) and the column body of the heat release pipe section (312) are connected to the water seal gasket (43) through body contact.

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